杂乱的学习笔记
来自个人维基
- 字串资源文件:frameworks/base/core/res/res/values-zh-rCN/strings.xml
- 在用户空间访问内核空间地址是不允许的,会抛出 "SIGSEGV" Exception:
- 如在 frameworks/base/services/surfaceflinger/DisplayHardware/HWComposer.cpp中加上以下代码:
status_t HWComposer::prepare() const { if (mList && mFlinger->isLayerScreenShotVisible()) { mList->flags |= HWC_LAYERSCREENSHOT_EXIST; } if (mList && (mList->flags & HWC_GEOMETRY_CHANGED)) { //hwc_layer_list_t* list = mList; LOGD("kaigo, HWComposer_prepare, list:%d, list->flags:%d, mList->numHwLayers:%d", (int)mList, mList->flags, mList->numHwLayers); for (size_t i=0 ; i<mList->numHwLayers ; i++) { //dump_layer(&list->hwLayers[i]); LOGD("kaigo, HWComposer_prepare, in for, i:%d", i); LOGD("kaigo, HWComposer_prepare, %d, i:%d, list->hwLayers[i]:%d", __LINE__, i, mList->hwLayers[i]); //这里会出错! } } int err = mHwc->prepare(mHwc, mList); ...
... 07-02 10:11:30.054 D/SurfaceFlinger( 655): kaigo, HWComposer_prepare, list:25733432, list->flags:1, mList->numHwLayers:1 07-02 10:11:30.054 D/SurfaceFlinger( 655): kaigo, HWComposer_prepare, in for, i:0 07-02 10:11:30.054 F/libc ( 655): Fatal signal 11 (SIGSEGV) at 0xdeadbaad (code=1) 07-02 10:11:30.054 D/AEE/AED ( 107): $===AEE===AEE===AEE===$ 07-02 10:11:30.054 D/AEE/AED ( 107): p 0 poll events 1 revents 0 ... 07-02 10:11:31.270 I/AEE/AED ( 667): $** *** *** *** *** *** *** *** Exception *** *** *** *** *** *** *** **$ 07-02 10:11:31.270 I/AEE/AED ( 667): Build Info: 'ALPS.ICS2.MP:ALPS.ICS2.MP.V1:MT6577:S01,vivo/bbk77_cu_ics2/bbk77_cu_ics2:4.0.4/IMM76D/1344848531:eng/test-keys' 07-02 10:11:31.271 I/AEE/AED ( 667): Exception Log Time:[Mon Jul 2 10:11:31 CST 2012] [62.970000] 07-02 10:11:31.271 I/AEE/AED ( 667): 07-02 10:11:31.271 I/AEE/AED ( 667): Exception Class: Native (NE) 07-02 10:11:31.271 I/AEE/AED ( 667): Exception Type: SIGSEGV 07-02 10:11:31.271 I/AEE/AED ( 667): 07-02 10:11:31.271 I/AEE/AED ( 667): Current Executing Process: 07-02 10:11:31.271 I/AEE/AED ( 667): pid: 655, tid: 657 07-02 10:11:31.271 I/AEE/AED ( 667): /system/bin/surfaceflinger 07-02 10:11:31.271 I/AEE/AED ( 667): 07-02 10:11:31.271 I/AEE/AED ( 667): Backtrace: 07-02 10:11:31.271 I/AEE/AED ( 667): #00 pc 0001f830 /system/lib/libc.so 07-02 10:11:31.271 I/AEE/AED ( 667): #01 pc 0001acf4 /system/lib/libsurfaceflinger.so (_ZNK7android10HWComposer7prepareEv) 07-02 10:11:31.271 I/AEE/AED ( 667): #02 pc 0001ec92 /system/lib/libsurfaceflinger.so (_ZN7android14SurfaceFlinger21setupHardwareComposerERNS_6RegionE) 07-02 10:11:31.271 I/AEE/AED ( 667): #03 pc 0001f372 /system/lib/libsurfaceflinger.so (_ZN7android14SurfaceFlinger13handleRepaintEv) 07-02 10:11:31.271 I/AEE/AED ( 667): #04 pc 00020d86 /system/lib/libsurfaceflinger.so (_ZN7android14SurfaceFlinger10threadLoopEv) 07-02 10:11:31.271 I/AEE/AED ( 667): #05 pc 0002453e /system/lib/libutils.so (_ZN7android6Thread11_threadLoopEPv) 07-02 10:11:31.271 I/AEE/AED ( 667): #06 pc 00024b84 /system/lib/libutils.so 07-02 10:11:31.271 I/AEE/AED ( 667): #07 pc 000136cc /system/lib/libc.so (__thread_entry) ...